import {
	mergeConfig,
	dispatchRequest,
	jsonpRequest
} from "./utils"

import store from '@/store'

export default class request {

	constructor(options) {
		// 请求公共地址
		this.baseUrl = options.baseUrl || "";
		// 公共文件上传请求地址
		this.fileUrl = options.fileUrl || "";
		// 超时时间
		this.timeout = options.timeout || 6000;
		// 服务器上传图片默认url
		this.defaultUploadUrl = options.defaultUploadUrl || "";
		// 默认请求头
		this.header = options.header || {};
		// 默认配置
		this.config = options.config || {
			isPrompt: true,
			load: true,
			isFactory: true,
			resend: 0
		};
	}

	// post请求
	post(url = '', data = {}, options = {}) {
		if (!data.onlyMy) {
			data.onlyMy = true;
		}
		return this.request({
			method: "POST",
			data: data,
			url: url,
			...options
		});
	}

	// get请求
	get(url = '', data = {}, options = {}) {
		// data.appKey=store.getters.platform;
		if (!data.onlyMy) {
			data.onlyMy = true;
		}
		return this.request({
			method: "GET",
			data: data,
			url: url,
			...options
		});
	}

	// put请求
	put(url = '', data = {}, options = {}) {
		// data.appKey=store.getters.platform;
		return this.request({
			method: "PUT",
			data: data,
			url: url,
			...options
		});
	}

	// delete请求
	delete(url = '', data = {}, options = {}) {
		// data.appKey=store.getters.platform;
		return this.request({
			method: "DELETE",
			data: data,
			url: url,
			...options
		});
	}

	// jsonp请求(只限于H5使用)
	jsonp(url = '', data = {}, options = {}) {
		return this.request({
			method: "JSONP",
			data: data,
			url: url,
			...options
		});
	}

	// 接口请求方法
	async request(data) {
		// 请求数据
		let requestInfo,
			// 是否运行过请求开始钩子
			runRequestStart = false;
		try {
			if (!data.url) {
				throw {
					errMsg: "【request】缺失数据url",
					statusCode: 0
				}
			}
			// 数据合并
			requestInfo = mergeConfig(this, data);
			// 代表之前运行到这里
			runRequestStart = true;
			// 请求前回调
			if (this.requestStart) {
				let requestStart = this.requestStart(requestInfo);
				if (typeof requestStart == "object") {
					let changekeys = ["data", "header", "isPrompt", "load", "isFactory"];
					changekeys.forEach(key => {
						requestInfo[key] = requestStart[key];
					});
				} else {
					throw {
						errMsg: "【request】请求开始拦截器未通过",
						statusCode: 0,
						data: requestInfo.data,
						method: requestInfo.method,
						header: requestInfo.header,
						url: requestInfo.url,
					}
				}
			}
			let requestResult = {};
			if (requestInfo.method == "JSONP") {
				requestResult = await jsonpRequest(requestInfo);
			} else {
				requestResult = await dispatchRequest(requestInfo);
			}
			// 是否用外部的数据处理方法
			if (requestInfo.isFactory && this.dataFactory) {
				// 数据处理
				let result = await this.dataFactory({
					...requestInfo,
					response: requestResult
				});
				return Promise.resolve(result);
			} else {
				return Promise.resolve(requestResult);
			}
		} catch (err) {
			this.requestError && this.requestError(err);
			return Promise.reject(err);
		} finally {
			// 如果请求开始未运行到，请求结束也不运行
			if (runRequestStart) {
				this.requestEnd && this.requestEnd(requestInfo);
			}
		}
	}

}